/Engine/Plugins/Runtime/RigVM/Source/RigVMDeveloper/Public/EdGraph/RigVMEdGraphSchema.h
Request to drop a variable on a panel
the response to rejection or performing the drop
virtual bool RequestVariableDropOnPanel ( [UEdGraph](API\Runtime\Engine\EdGraph\UEdGraph) * InGraph, [FProperty](API\Runtime\CoreUObject\UObject\FProperty) * InVariableToDrop, const FVector2D & InDropPosition, const FVector2D & InScreenPosition )